WO2003076733A1

WO2003076733A1 - Space truss

Info

Publication number: WO2003076733A1
Application number: PCT/JP2003/003011
Authority: WO
Inventors: Yumio Moriya
Original assignee: Mia Inc.
Priority date: 2002-03-13
Filing date: 2003-03-13
Publication date: 2003-09-18
Also published as: CA2495658A1; JP2003268872A; AU2003221373A1; EP1496166A4; EP1496166A1; US20050144884A1; KR20050002851A; CN1650075A

Abstract

A space truss is obtained that reduces the number of members forming longitudinal and transverse chord members or diagonal members and simplifies assembling operation or the like. Longitudinal and transverse chord members (2a, 2b; 3a, 3b) in an upper and lower lattices (2, 3) are formed by lattice-wise disposing long-sized bar members (8) having a length twice the intersection distance and connecting the connecting sections (8a, 8a) at the ends of long-sized bar members (8, 8) crossing a central connecting section (8b) to the latter, while diagonal members (4a, 4b) interconnecting the intersections (5, 6) of the chord members in the two lattices (2, 3) are formed by lattice-wise disposing V-shaped bent bar members (10) and connecting the connecting sections (10a, 10a) at the ends of the bent bar members (10, 10) crossing the connecting section (10b) in the middle of each bent bar member (10) to the connecting section (10b).

Description

Specification

Space truss technical field

TECHNICAL FIELD The present invention relates to a space truss used for a skeleton of various structures. Background art

As this type of space truss, those shown in FIGS. 12 and 13 have been conventionally known. The truss 50 has a rectangular upper lattice 51 composed of vertical and horizontal chords 53a and 53b, a rectangular lower lattice 52 similarly composed of vertical and horizontal chords 54a and 54b, and both lattices 51 and 52. It consists of cross members 55a and 57b that connect the intersections 55 and 56 of the chords in.

In such a space truss 50, many string members 53a, 53b, 54a, 54b and diagonal members 57a, 57b are combined so as to cross each other, and they are interconnected at intersections 55, 56. Since it must be assembled and assembled, not only is handling and handling such as management and transportation of each member troublesome, but also a lot of trouble is required to connect them. Therefore, it is desired to reduce the number of members as much as possible and to simplify the connection work.

However, the above-mentioned known space truss generally includes a vertical bar 53a, 53b, 54a, 54b, a diagonal bar 57a, 57b and a short bar 58, 59 divided at each intersection. Because they are formed by connecting, the number of members is very large, and handling and assembly of them is very troublesome.

If the string members 53a, 53b, 54a, 54b and the diagonal members 57a, 57b are formed of bars having the same length as the dimensions of the grids 51, 52, the number of members can be reduced. Although it is possible, it becomes rather difficult to manufacture, store, or transport them as the length of the individual members increases.

It is conceivable to use a bar of intermediate length that straddles between multiple intersections, but depending on the length, when connecting multiple bars in a row and column according to the truss dimensions, When the length and width of the truss are different, 3 to 4 types of rods Need lumber. In addition, since the number of bars connected to each other at each intersection may be different, parts such as washers and spacers to be used may be different, which may make parts management and connection work troublesome.

The technical problem of the present invention is to share the vertical and horizontal chords constituting the upper lattice and the lower lattice of the three-dimensional truss, and the diagonal material connecting these lattices, each having a specific length and shape. The purpose of the present invention is to reduce the number and types of bars to be used, to facilitate the handling thereof, and to simplify the truss assembling work by connecting the formed bars. Disclosure of the invention

In order to solve the above-mentioned problems, the space truss of the present invention comprises a rectangular upper lattice and a lower lattice composed of vertical and horizontal chords crossing each other, and a diagonal member interconnecting the intersections of the chords in both lattices. It is configured. The vertical and horizontal chords in both lattices are mainly composed of long rods that are twice as long as the distance between intersections and have connecting portions at both ends and the center, respectively. At the intersections, connect the end of the long bar that intersects the center of the long bar to the center of the long bar, and connect the end of the chord having the length that exceeds the length to the long bar. Instead, it is formed by connecting short bars each having a length equal to the distance between intersections and having connecting portions at both ends, and the diagonal member has connecting portions at both ends and the center. A V-shaped bent bar is used as a main member, and a plurality of bent bars are arranged so as to cross each other and cross obliquely at the respective intersections with the chords of both lattices. At the point of intersection, connect the end of the bent bar to the center of the bent bar and That the end portion of the slant member instead of the bending rod, and is formed by connecting a straight bar having a connecting portion at both ends in the side and the length of the V-shaped said bent bar.

In the three-dimensional truss of the present invention having the above structure, the vertical and horizontal chords constituting the upper lattice and the lower lattice are mainly composed of long rods having a length twice as long as the distance between intersections, and The diagonal bar is formed by connecting a bent bar having a V-shape as a main material and sequentially connecting the bent bar in a specific pattern. The number and types of bars used are small, Since it is easy and the bars can be sequentially connected in a fixed pattern, the work of assembling the truss is simplified.

In the present invention, the central connecting portion and the end connecting portion of each of the rods are formed by flattening a part of the rod.

According to one specific configuration of the present invention, the central connecting portion and the end connecting portion of each bar have the same size as each other, and the vertical and horizontal chords at each intersection of the two lattices. And the diagonal material overlap the above-mentioned connecting parts of each bar directly or through a spacer, and tighten these connecting parts with ports and nuts through washers arranged on both sides thereof. Thus, they are connected to each other.

According to another specific configuration of the present invention, the size of the connecting portion at the end of each bar is 1 Z2 which is the size of the central connecting portion, and one side of each connecting portion is provided. A reinforcing member that also serves as a spacer is provided on the body, and at each intersection of the two lattices, the vertical and horizontal chords and the diagonal bar are connected to the center connecting portion of the bar, and The connecting portions at the ends of the bars are directly polymerized with their ends abutting each other, and these connecting portions are connected to each other by tightening with a plurality of ports and nuts via washers arranged on both sides thereof. ing.

According to the present invention, of the intersections where the chord and the diagonal material are connected, at the respective intersections on the inner side excluding the intersections located at the outer peripheral portions of both lattices, the rods in the chord and the diagonal material are used. The number of connected members is three, and the chord members and the diagonal members are connected to each other by the same connecting structure at each of the inner intersections.

This makes it possible to connect the above-mentioned chord and diagonal members in the same manner using the same parts at the respective intersections, so that the truss assembly becomes easier. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a plan view schematically showing an embodiment of a space truss according to the present invention, in which an upper lattice and a lower lattice are emphasized.

FIG. 2 is a plan view schematically showing an embodiment of the space truss according to the present invention, with the diagonal members being emphasized.

FIG. 3 is a schematic side view of the space truss. FIG. 4 (A) is a plan view of a long bar forming a chord in the space truss of the present invention, and FIG. 4 (B) is a plan view of a short bar.

FIG. 5 is a partial plan view in an exploded state showing a configuration of chord members in the upper lattice.

FIG. 6 (A) is a side view of a bent bar forming a diagonal bar in the space truss of the present invention, and FIG. 6 (B) is a side view of a straight bar.

FIG. 7 is a partial plan view showing a configuration of a diagonal member in an exploded state.

FIG. 8 is a plan view of a principal part of a connection structure between a chord member and a diagonal member in a space truss according to the present invention, typically showing one intersection point of an upper lattice.

FIG. 9 is a cross-sectional view obtained by combining a cross-section of the chord at the position of line AA in FIG. 8 and a cross-section of the slant at the position of line BB in FIG.

FIG. 10 is a view showing a second embodiment of the connection structure between the chord members and the diagonal members in the space truss of the present invention. It is a fragmentary sectional view.

FIG. 11 is an exploded perspective view of FIG.

FIG. 12 is a plan view showing the overall configuration of a conventional space truss. FIG. 13 is a side view of the same. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3 schematically show one embodiment of a space truss according to the present invention. This three-dimensional truss 1 has the same basic form as the conventional truss 50 shown in FIGS. 12 and 13 and has a rectangular upper lattice 2 composed of vertical and horizontal chords 2 a and 2 b crossing each other. Similarly, a rectangular lower lattice 3 composed of vertical and horizontal chords 3 a and 3 b, an intersection 5 of the chords 2 a and 2 b in the upper lattice 2 and an intersection of the chords 3 a and 3 b in the lower lattice 3 6 and diagonal members 4a and 4b interconnecting them. However, as described below, the configuration of the chord members 2a, 2b, 3a, 3b and the diagonal members 4a, 4b is different from that of the conventional truss 50 described above.

For simplicity of the drawing, Fig. 1 shows upper grid 2 and lower grid 3 The upper and lower grids 2 and 3 are emphasized by representing the vertical and horizontal chords 2a, 2b and 3a, 3b with solid lines of different thicknesses and the diagonals 4a, 4b with chain lines. In Fig. 2, the diagonal members 4a and 4b are represented by solid lines, and the upper lattice 2 and the lower lattice 3 are represented by chain lines and dotted lines, so that the diagonal members 4a and 4b are emphasized. I have. The vertical and horizontal chords 2 a, 2 b and 3 a, 3 b in the upper lattice 2 and the lower lattice 3 are each twice the distance L between the intersections 5, 5 as shown in FIG. 4 (A). A short bar having a length equal to the distance L between the intersections, as shown in FIG. 4 (B), is formed mainly of a long bar 8 having a length of Material 9 is used. Each of the long bar material 8 and the short bar material 9 is made of a metal pipe material having a circular or square cross section, and in the case of the long bar material 8, it is located at both ends and the center. Each has flattened rectangular connecting portions 8a and 8b, and the short bar 9 has flattened rectangular connecting portions 9a at both ends. These connecting portions 8a, 8b, 9a have the same size as each other. In the drawing, reference numeral 12 denotes port holes provided in the connecting portions 8a, 8b, 9a. The upper grid 2 and the lower grid 3 are constituted by the long bar 8 and the short bar 9 as follows. Note that these two gratings 2 and 3 differ only in size from each other, and have basically the same structure. Therefore, the structure of the upper grating 2 will be described as an example.

That is, as shown in an enlarged manner in FIG. 5, the vertical and horizontal chord members 2a and 2b in the upper lattice 2 are formed by arranging the long bar members 8 in the vertical and horizontal directions and sequentially connecting them. Have been. At this time, the arrangement position of the long bar 8 in the adjacent chords 2 a, 2 & or 2, 2 b is shifted in the axial direction by 1 Z 2 of the length, that is, the distance L between the intersections. As a result, the connecting portions 8a, 8a at the ends of the long bars 8, 8, which intersect with the connecting portions 8b at the center of each long bar 8, are connected, and the pattern is repeated. Then, as shown in FIG. 1, when the above-mentioned long bar 8 is connected to the end of the chord, if the length is short, the above-mentioned long bar is attached to the end of this chord. The short bar 9 is connected instead of the bar 8. The rectangular upper lattice 2 is formed by sequentially connecting the long rods 8 and the short rods 9 in such a pattern. The lower lattice 3 is similarly configured.

The diagonal members 4a and 4b are bent into a V shape as shown in Fig. 6 (A). The bent bar 10 is composed mainly of the bent bar 10 and the ends of some of the diagonal bars have the same length as one side of the V-shaped bent bar 10 as shown in Fig. 6 (B). The formed straight bar 11 is used. The bent bar 10 and the straight bar 11 are both made of metal pipe material. In the case of the bent bar 10, a rectangular connecting portion 10 flattened at both ends and the center thereof. a and 10b, and the straight bar 11 has flattened rectangular connecting portions 11a at both ends. These connecting portions 10a, 10b, 11a have the same size as the connecting portions 8a, 8b, 9a of the long bar 8 and the short bar 9, respectively.

As can be seen from FIGS. 2 and 7, a plurality of bent bars 10 cross each other, and the longitudinal and lateral chords 2a, 2b and 3a, 3b of the two lattices 2, 3 mentioned above. Are arranged so as to cross diagonally at the intersections 5 and 6, respectively, and are connected to the central connecting portion 8b of each bent bar 10 at the intersections 8b. Connect the connecting portions 10a and 10a at the ends. If the bent bar 10 is connected to the end of the diagonal bar and the length of the bar is short, the bent bar 10 is connected to the end of the diagonal bar 4a and Z or 4b. Instead of the above, the straight bar 11 is connected. Reference numeral 13 in FIG. 6 is a port hole provided in each of the connecting portions 10a, 10b, and 11a.

In the diagonal member 4a inclined in the upper right direction in the figure, the bent bar 10 is arranged in an inverted V-shape with the central connecting part 10b facing upward, and this central connecting part 10b is It is connected to the intersection 5 of the chords 2 a, 2 b of the upper lattice 2, and the connecting portions 10 a, 10 a at both ends are connected to the intersection 6 of the chords 3 a, 3 b of the lower lattice 3. On the other hand, in the diagonal member 4b inclined downward to the right, the bent bar 10 is arranged in a V-shape with the central connecting portion 10b facing downward, and the central connecting portion 10b It is connected to the intersection 6 of the chords 3 a and 3 b of the lattice 3, and the connecting portions 10 a and 10 a at both ends are connected to the intersection 5 of the chords 2 a and 2 b of the upper lattice 2.

The rods 8, 9, 10, and 11 that constitute the chords 2 a, 2 b, 3 a, and 3 b and the diagonal pieces 4 a and 4 b are the chords 2 a, 2 b, and 3 a, 3 a, respectively. They are connected together at the intersections 5 and 6 of b. Figures 8 and 9 show the intersection 5 of one of the vertical and horizontal chords 2a, 2b in the upper grid 2 with these chords 2a, 2b and the diagonals 4a, 4b. The tie structure is shown as a representative. This intersection 5 is located on the outer periphery of the upper lattice 2 Except for the intersection 5a (see Fig. 1), at each intersection 5 located inside the grid, except for the intersection 5a (see Fig. 1), the vertical and horizontal chords 2a, 2b and the oblique The members 4a and 4b are connected to each other by the same connection structure. That is, the connecting portion 8b at the center of the long bar 8 forming the one-way chord 2a, and the connecting portion 8 at the end of the long bar 8, 8 forming the chord 2b intersecting therewith. a and 8a are superimposed on each other, and at the overlapped portion, via spacers 14a and 14b, a bent bar material 10 forming a one-way diagonal member 4a is formed. The central connecting portion 10b and the connecting portions 10a and 10a at the ends of the bent bars 10 and 10 forming the oblique member 4b intersecting with each other are superimposed on each other, and their superposition is performed. The part is fixed by a port 16 and a nut 17 via washers 15 and 15 arranged at both ends thereof.

In FIG. 9, the cross section of the vertical and horizontal chord members 2a and 2b is shown as a cross section at the position of line A—A in FIG. 8, and the crossing of the diagonal members 4a and 4b is shown. As for the part, the state of cross section at the position of line BB in FIG. 8 is displayed.

As described above, at each of the intersections 5 located inside the upper lattice 2, the number of bars 8 and 9 connected to each other in the vertical and horizontal chords 2 a and 2 b and the number of the diagonals 4 a and 4 b The number of bars 10 and 11 connected to each other is three each, which is the same number. For this reason, they can be connected by the same connection structure using common spacers 14a, 14b, washers 15 or ports 16 and nuts 17, etc. Etc. become very simple. This is made possible by connecting the bars 8 and 10 forming the vertical and horizontal chords 2a, 2b and the diagonal members 4a, 4b with a unique pattern as described above. It becomes. This is exactly the same for the intersection 6 inside the lower lattice 3.

On the other hand, at the intersections 5a and 6a located on the outer periphery of the lattices 2 and 3, the number of bars 8, 9 and 10 and 11 to be connected is smaller than that at the interior intersections 5 and 6. However, they can be connected using the same spacers 14a and 14b, washers 15 or ports 16 and nuts 17 and the like.

The connection structure at the intersections 5 and 6 is not limited to the above-described example, and other connection structures can be used. For example, omitting the above spacers 14 The connecting portions 8a, 8b, 9a, 10a, 10b, 11a of the bars 8, 9, 10, 11 may be directly superimposed. Alternatively, a connection structure such as the second embodiment shown in FIGS. 10 and 11 can be used.

Figs. 10 and 11 show the second embodiment of the connection structure between the chords 2a, 2b and the diagonal members 4a, 4b, as in Figs. 8 and 9 above. This is representatively shown for one intersection 5 located inside the grid 2. In the second embodiment, the connecting portions 8a, 10a at the ends of the rods 8, 10 are formed to have a size of 1Z2 of the central connecting portions 8b, 10b. On one surface of each of the connecting portions 8a, 8b, 10a, and 10b, a thick reinforcing member 20a, 20b and 21a, 21b also serving as a spacer are provided on the body. The reinforcing members 20a, 20b and 21a, 21b have substantially the same shape and size as the connecting portion to which they are attached, and may be provided by fixing a metal plate by welding or the like. it can. In the middle connecting portions 8b and 10b of the long bar 8 and the bent bar 10, four port holes 12 are respectively provided at corresponding positions, and the end portions of the long bar 8 are provided. The connection portion 8a is provided with two port holes 12. On the other hand, the connecting portion 10a at the end of the bent bar 10 is provided with one port hole 12 at the center thereof and a half hole 12a at each end, and two bent bars are provided. When the connecting portions 10a and 10a of the members 10 and 10 abut against each other, one port hole 12 is formed by the two opposite holes 12a and 12a of the both connecting portions 10a and 10a. Has become. The central connecting portion 8b of the long bar 8 forming the one-way chord 2a is connected to the end of the two long bars 8, 8 forming the intersecting chord 2b. The connecting portions 8a, 8a are brought into contact with each other without the reinforcing members 20a, 20b in a state in which the tips of the connecting portions 8a, 8a abut against each other in the same plane. Two bent bars 10 which form a diagonal bar 4b which intersects with the central connecting part 10b of the bent bar 10 forming the one-way diagonal bar 4a The connecting portions 10a, 10a at the end portions of the connecting portions 10a, 10a are joined to each other in a state where the tips of the connecting portions 10a, 10a abut against each other, and the back surfaces without the reinforcing members 21a, 21b are provided. And polymerized directly. Further, the connecting portions of the chords 2a, 213 and the diagonal members 4 &, 4b are combined with the reinforcing members 20a, 20a and 21a, 21a in contact with each other. They are superimposed on each other and are connected to each other by fastening with four ports 16 and nuts 17 via washers 15 and 15 arranged on both sides of these connecting parts.

Although not particularly shown in the second embodiment, the short rods 9 and the connecting portions 9a and 11a at the ends of the straight rods 11 are also connected to the long rods 8 and The connecting portions 8a and 10a at the ends of the bent bar 10 are formed in the same size as the connecting portions 8a and 10a, and the reinforcing members 20a and 21a as described above are respectively provided on the body. In addition, at the intersection 5a located on the outer periphery of the upper lattice 2, if there are no connecting parts that should be brought into contact with each other because the number of bars to be connected is small, that part has the same thickness as this connecting part. Install the separate controllers and connect them in the same manner as in Fig. 9.

The connection structure of the intersections in the second embodiment can be exactly the same for the lower lattice 3.

Thus, the space truss 1 is composed of the long and horizontal chords 2a, 2b and 3a, 3b constituting the upper lattice 2 and the lower lattice 3, and the long bar having a length twice as long as the distance L between the intersections. 8 as the main material, and by sequentially connecting them in a specific pattern, the diagonal members 4a and 4b connecting the two lattices 2 and 3 are combined with the bent bar 10 having a V-shape. As the main material, the bent bars 10 are sequentially connected in a specific pattern, so that they are compared with the conventional truss formed by using short bars divided at each intersection. Since the number of bars used is reduced to almost half, handling them is easy, and the bars can be connected in a fixed pattern one after another, which simplifies the truss assembly work. Moreover, the number of bars connected at the intersections 5 and 6 and the connection structure are shared, and the reinforcing members used, such as washers, ports and nuts, are also shared, making truss assembly work easier. At the same time, the management of used parts becomes easier.

The truss 1 is formed into a planar shape by forming the vertical and horizontal chords 2 a, 2 b and 3 a, 3 b using straight long bar 8 and short bar 9, respectively. By forming either one of the vertical and horizontal chords 2a, 3a or 2b, 3b using a long bar 8 and a short bar 9 that are curved in an arc shape, It can be formed into a shape. Industrial applicability

As described above, according to the three-dimensional truss of the present invention, the vertical and horizontal chord members constituting the upper lattice and the lower lattice and the diagonal members connecting these lattices are respectively shared by a specific length and shape. It is suitable to reduce the number and types of members used to facilitate the handling and to simplify the truss assembly work, etc. by connecting the formed rods.

Claims

The scope of the claims

1. It consists of rectangular upper and lower grids consisting of vertical and horizontal chords that intersect each other, and diagonals that interconnect the intersections of the chords in these two grids,

The vertical and horizontal chords in both lattices are mainly composed of long rods that are twice as long as the distance between intersections and have connecting parts at both ends and the center, respectively. At each of the intersections, connect the end of the long bar that intersects with the center of the long bar at the intersection, and replace the long bar with the end of the chord that has an excess length. Formed by connecting short rods having a length equal to the distance between intersections and having connecting portions at both ends,

The diagonal bar is mainly composed of a V-shaped bent bar having connecting portions at both ends and a center, and a plurality of bent bars intersect each other and each chord of the two lattices intersects with each other. At each of the above intersections, connect the end of the bent bar that intersects with the center of the bent bar, and at the intersection of Formed by connecting a straight bar having the same length as one side of the V-shape of the bent bar and having connecting portions at both ends, instead of the bent bar.

A three-dimensional truss characterized by the following.

2. The three-dimensional truss according to claim 1, wherein a center connecting portion and an end connecting portion of each bar are formed by flattening a part of the bar. .

3. The connecting portion at the center and the connecting portion at the end of each bar have the same size as each other, and the vertical and horizontal chords and the diagonal bar at the intersections of both lattices are connected to each other by the bar. The parts are superimposed on each other directly or through a spacer, and these parts are connected to each other by tightening them with ports and nuts through washers arranged on both sides of the parts. 3. The space truss according to claim 2, wherein the space truss is provided.

4. The size of the connecting part at the end of each bar is 1/2 of the size of the central connecting part, and a reinforcing member that also serves as a spacer is provided on one side of each connecting part. At each intersection of the two lattices, the vertical and horizontal chords and the diagonal bar are connected to the center connecting portion of the bar, and the connecting portions at the ends of the two bars crossing the bar are connected to each other. Butting 3.The superposed parts are directly polymerized in a state of being connected to each other, and are connected to each other by fastening these connecting parts with a plurality of ports and nuts via washers arranged on both sides thereof. Space truss.

5. Among the intersections where the above-mentioned chords and diagonal bars are connected, the number of bars connected to the above-mentioned chords and diagonal bars at the respective inner intersections except for the intersections located at the outer peripheral portions of both lattices. 5. The method according to claim 1, wherein the number of the strings is three, and the string and the diagonal are connected to each other by the same connection structure at each of the inner intersections. Space truss described in Crab.